/* * TINYEXPR - Tiny recursive descent parser and evaluation engine in C * * Copyright (c) 2015, 2016 Lewis Van Winkle * * http://CodePlea.com * * This software is provided 'as-is', without any express or implied * warranty. In no event will the authors be held liable for any damages * arising from the use of this software. * * Permission is granted to anyone to use this software for any purpose, * including commercial applications, and to alter it and redistribute it * freely, subject to the following restrictions: * * 1. The origin of this software must not be misrepresented; you must not * claim that you wrote the original software. If you use this software * in a product, an acknowledgement in the product documentation would be * appreciated but is not required. * 2. Altered source versions must be plainly marked as such, and must not be * misrepresented as being the original software. * 3. This notice may not be removed or altered from any source distribution. */ // This version was altered and ported to C++ for inclusion in fish. #ifndef __TINYEXPR_H__ #define __TINYEXPR_H__ typedef enum { TE_ERROR_NONE = 0, TE_ERROR_UNKNOWN_VARIABLE = 1, TE_ERROR_MISSING_CLOSING_PAREN = 2, TE_ERROR_MISSING_OPENING_PAREN = 3, TE_ERROR_TOO_FEW_ARGS = 4, TE_ERROR_TOO_MANY_ARGS = 5, TE_ERROR_MISSING_OPERATOR = 6, TE_ERROR_UNKNOWN = 7 } te_error_type_t; typedef struct te_error_t { te_error_type_t type; int position; } te_error_t; /* Parses the input expression, evaluates it, and frees it. */ /* Returns NaN on error. */ double te_interp(const char *expression, te_error_t *error); #endif /*__TINYEXPR_H__*/